<template>
  <div class="login_container">
    <div class="login_box">
      <div class="avater_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <el-form
        ref="loginForm"
        class="demo-form-inline"
        :rules="loginRules"
        :model="loginForm"
      >
      <!-- ref 是vue 里面获取组件对象 挂在在vue实例身上 可以通过ref查找组件对象 -->
        <el-form-item prop="username">
          <el-input
            prefix-icon="iconfont icon-user"
            v-model="loginForm.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            type="password"
            prefix-icon="iconfont icon-3702mima"
            v-model="loginForm.password"
          ></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="setForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: { // 表单双向数据绑定
        username: '', // ，每个字段名字和就校验规则保持一致
        password: ''
      },
      loginRules: { // 表单校验规则
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    setForm() {
      this.$refs.loginForm.resetFields() // 通过ref绑定表单DOM对象挂载到vue 实例身上 通过 $refs获取
    },
    login() {
      this.$refs.loginForm.validate(async boolean => { // 登录前的预校验 也是组件对象身上的方法
        console.log(this.$router)
        if (!boolean) return this.$message.error('请正确填写用户名和密码')
        const { data: res } = await this.$http.post('/login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败' + res.meta.msg)
        sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avater_box {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  background-color: #fff;
  box-shadow: 0 0 10px #ddd;
}
.avater_box img {
  height: 100%;
  width: 100%;
  border-radius: 50%;
  background-color: #eee;
}
.demo-form-inline {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
